Solve with substitution y=4x-9 y=x-3

To solve the problem, you need to put in a value for y that substitutes a x for the y. We will use your first equation:

y=4x-9 Let us replace y with (x-3) as that is what the second equations gives us.

x-3=4x-9 Get the x and numbers on separate sides of the equation through subtraction.

3x=6 Divide both sides by 3 to isolate x.

x=2 Now plug the value of x into one of your original equations (it doesn't matter which one).

y=x-3 = (2) - 3=-1

Your answer is x=2, y=-1